File:Bbinary Abacus 002.jpg

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Summary

Description
English: A binary abacus constructed by Dr. Robert C. Good, Jr.
Date
Source Own work
Author Jaynegeorge
Camera location38° 46′ 06″ N, 121° 21′ 42″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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10 January 2010

38°46'5.999"N, 121°21'42.001"W

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9c5feeabde4173011a4ac9557fd5f0051d4b4b1b

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Date/TimeThumbnailDimensionsUserComment
current02:48, 2 October 2015Thumbnail for version as of 02:48, 2 October 20151,600 × 1,200 (1,007 KB)SteinsplitterBotBot: Image rotated by 180°
07:06, 12 January 2010Thumbnail for version as of 07:06, 12 January 20101,600 × 1,200 (1,007 KB)Jaynegeorge{{Information |Description={{en|1=A binary abacus}} |Source={{own}} |Author=Jaynegeorge |Date=2010-01-10 |Permission= |other_versions= }}
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